DNA

deoxyribose nucleic acid

deoxyribose nucleic acid

DNA

Nucleus

where is DNA located

DNA controls

all chemical changes what kind of cell is formed the kind of organism that is created

DNA

a vey large molecule made of long chain sub-units

Nucleotides

deoxyribose (a sugar) -PO4 (a phosphate group) An organic base

Deoxyribose

A cyclic molecule made of 5 carbons and lacks an oxygen molecule

Organic bases

Divided into 2 categories adenine thymine cytosine guanine

Purines

Double ring Nitrogen base Adenine guanine

pyrimidines

Single ring Nitrogen base Cytosine Thymine

Molecule

A ________ of DNA is formed by millions of nucleotides joined together to make a large chain

double strand

DNA consists of a _________________of nucleotides

Thymine

Adenine forms a bond with _________

guanine

Cytosine forms a bond with ________

Nucleotides

__________ bond between DNA strands

Hydrogen bonds

_______ ________ hold the bases together

2 bonds

how many bonds do adenine and thymine have?

3 bonds

how many bonds do cytosine and guanine have?

Double helix

the paired strands are are coiled into a spiral

DNA replication

DNA strands unwind and separate Each strand makes a new partner by adding the appropriate nucleotides Now there are 2 double-stranded DNA molecules in the nucleus When the cell divides, each nucleus will have identical DNA

Genetic Code

A sequence of bases in DNA forms __________

Triplet

A _______ controls the production of a particular amino acid in the cytoplasm of the cell The difference amino acids and the order which they are joined up determines the sort of protein being produced

Gene

a sequence of triplets in the DNA molecule may code for a particular protein a thousand or more bases in a _______